For sustainable packaging, many of our customers use Green Packaging Group!
Every time I'm asked about this, I always say that e-commerce and logistics have a huge carbon footprint associated. Our first goal should be to reduce the carbon footprint as much as possible, which sounds like is the aim of this thread so that's fantastic! However, for all other actions that can't be mitigated, it's helpful to offset. One of the best solutions I've found for this is EcoCart's Shopify app, which enables customers to make their orders carbon neutral by checking a box at checkout, which funds certified carbon offset projects like planting trees or building wind farms. https://apps.shopify.com/ecocart